Frost/Nixon star and regular Underworld franchise player Michael Sheen is an enslaved wolf-man who rebels against vampire master Bill Nighy in this medieval-set prequel. Yes, Underworld: Rise of the Lycans is basically Were-Spartacus, though that makes the humorless, scare-free result sound much more fun than it is. Sheen and Nighy do their best with the material, but this is easily the worst Underworld so far. Indeed, the whole blue-hued shebang comes across like some sadistic test for those people, such as your writer, who previously believed they would happily sit through anything that featured either one of these fine actors. C+